Vortec 5.3L V8 SFI FlexFuel, 4-Speed Automatic with Overdrive, and 4WD. Sleek Black! Crew Cab! Want to stretch your purchasing power? Well take a look at this stunning-looking 2008 GMC Sierra 1500. The pin-you-to-your-seat performance of this terrific Sierra 1500 will make it a favorite among our more passionate buyers. It scored the top rating in the IIHS frontal offset test. You can count on Kemna.